The temperature at which lattices begin to be appreciably mobile is sometimes termed the Tammann Temperature; and that at which surface atoms become significantly mobile, the Hüttig temperature. For simple compounds without phase changes on heating and of low vapor pressure, the Tammann temperature is very approximately 0.5 Tm and the Hüttig temperature about 0.3 Tm , where Tm is the melting point in absolute units. Appreciable mobility appears at about Tm/3 for metals[1].
烧结是在远低于固态物质的熔融温度下进行的，一种物质开始呈现显著扩散作用的温度，此称为泰曼温度或烧结温度。泰曼(Tammann)发现烧结温度(TS)和熔融温度(Tm)的关系有一定的规律[2]：
金属 TS ≈ （0.3~0.4）Tm
盐类 TS ≈ 0.57 Tm
硅酸盐 TS ≈ （0.8~0.9）Tm
烧结和熔融这两个过程都是由原子热振动而引起的，但熔融时全部组元都转变为液相，而烧结时至少有一组元是处于固态。
References:
1. Charles N. Satterfield. Heterogeneous Catalysis in Industrial Practice(2nd Edition). McGraw-Hill, Inc. 1991.
2. 叶瑞伦，方永汉等. 无机材料物理化学. 中国建筑工业出版社. 1986，
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金属铜熔点的1/2或1/3
有一本叫金属催化剂的书上有描述！
The temperature at which lattices begin to be appreciably mobile is sometimes termed the Tammann Temperature; and that at which surface atoms become significantly mobile, the Hüttig temperature. For simple compounds without phase changes on heating and of low vapor pressure, the Tammann temperature is very approximately 0.5 Tm and the Hüttig temperature about 0.3 Tm , where Tm is the melting point in absolute units. Appreciable mobility appears at about Tm/3 for metals[1].
烧结是在远低于固态物质的熔融温度下进行的，一种物质开始呈现显著扩散作用的温度，此称为泰曼温度或烧结温度。泰曼(Tammann)发现烧结温度(TS)和熔融温度(Tm)的关系有一定的规律[2]：
金属 TS ≈ （0.3~0.4）Tm
盐类 TS ≈ 0.57 Tm
硅酸盐 TS ≈ （0.8~0.9）Tm
烧结和熔融这两个过程都是由原子热振动而引起的，但熔融时全部组元都转变为液相，而烧结时至少有一组元是处于固态。
References:
1. Charles N. Satterfield. Heterogeneous Catalysis in Industrial Practice(2nd Edition). McGraw-Hill, Inc. 1991.
2. 叶瑞伦，方永汉等. 无机材料物理化学. 中国建筑工业出版社. 1986，
linkinghub.elsevier.com/retrieve/pii/001623619090127C - 类似网页
在google上看到是405度，Tammann temperature of Cu (405C）
Fuel
Volume 69, Issue 11, November 1990, Pages 1440-1447，太早了，无法下载全文！
谢谢大家啦！